Gaseous element mercury

Gold-coated sand for amalgamation was synthesized and applied for the determination of mercury in ambient air using a home-made dual gold trap unit coupled to atomic absorption spectrometer. Gold-coated sand is prepared by chemical reduction of Au(III) solution with hydroxylamine depositing elemental gold on acid-etched sand.

12p vilisbon2711 02-01-2020 8 0   Download

A phenomenon called “mercury sunrise” was discovered in 1995 by Canadian atmospheric researcher Bill Schroeder working in the Arctic. The phenomenon occurs when the sun first returns after the long dark winter, producing high levels of one form of mercury, called reactive gaseous mercury. In fact the highest levels of this form of mercury ever recorded were found in the Canadian Arctic. At the same time, levels of elemental mercury drop dramatically. When he first saw the mercury readings on his instruments fluctuate wildly, Dr. Schroeder assumed the instruments were not working properly.

29p yeurauxanh88 01-10-2012 44 3   Download